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Search Results - June Mackenzie

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Figure 1. (left) Inclusion consisting of a liquid phase with a vapour bubble. Figure 2. (right) Polariscope-revealed inclusion

Gemstones
Understanding inclusions: part 5 tourmaline

Always colourful, always durable; tourmaline is a jewellery-industry favourite. JUNE MACKENZIE reports. Read more »
Figure 1. (left) Corrosion tubes. Figure 2. (right) Lamellar twinning

Gemstones
Understanding inclusions: part 4 tanzanite

Compared to other gemstones, tanzanite is young. JUNE MACKENZIE discusses this popular gemstone that Tiffany & Co brought to market in the 1960s. Read more »
Figure 1 (left). Synthetic flux emerald. Figure 2 (centre). Hydrothermal emerald. Figure 3 (right). Natural emerald

Gemstones
Understanding inclusions: part 3 emerald

Understanding emerald inclusions is a vital part of the sales process. JUNE MACKENZIE reports. Read more »
Figure 1. Natural, BeHT sapphire.  Figure 2. Synthetic, flame fusion sapphire

Gemstones
Understanding inclusions: part 2 sapphire

Inclusions are an integral part of identifying any range of treatments that can be applied to gemstones to boost value. JUNE MACKENZIE reports. Read more »
Figure 1. Natural ruby. Figure 2. Heat-treated ruby

Gemstones
Understanding inclusions: Part 1 ruby

Inclusions are a gemmologist’s best friend. Why? Well, inclusions can determine whether a gemstone is natural, natural but treated for enhancement purposes, synthetic or man-made. JUNE MACKENZIE reports. Read more »

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